Police have arrested 21-year-old Anthony Moaf after he had barricaded himself since 4 a.m. on Sunday in Herndon, Virginia. No one was injured in the incident but a standoff with Moaf, who police believe was armed, lasted for nearly 10 hours.

Metro’s Red Line will single track Tuesday morning after Monday’s derailment. Trains will run every 10 minutes between Glenmont and Shady Grove Metro stations. Commuters should plan for extra travel time.

It was a terrifying couple of minutes in the U.S. as an emergency alert was sent out in Hawaii urging citizens to seek shelter from an inbound ballistic missile. It turned out to be a false alarm but WTOP’s John Aaron, who is honeymooning on the island, described the scene of panic and fear — and its likely long-lasting effects.

Drivers on Tuesday headed out for the morning rush later in the day as ice and fog lingered throughout the D.C. region. The icy conditions prompted some school systems to change from opening late to not opening at all. Here are photos of the early morning fog that hovered over the region and ice from around the area.